CN101126381A

CN101126381A - 160Mpa electro-hydraulic proportional control radial piston pump

Info

Publication number: CN101126381A
Application number: CNA2006101050268A
Authority: CN
Inventors: 卢堃; 董啸
Original assignee: LU KUN DONG XIAO
Current assignee: LU KUN DONG XIAO
Priority date: 2006-08-17
Filing date: 2006-08-17
Publication date: 2008-02-20
Anticipated expiration: 2026-08-17
Also published as: CN100516513C

Abstract

The invention discloses a 160Mpa electrohydraulic proportional control radial plunger pump, comprising a slippage pump, a plunger, a case, an inlet valve, a stator, a pump bonnet, a vent valve, a transmission shaft, a bearing and so on. The invention is characterized in that the stator is arranged on the transmission shaft which is in the middle of a main oil pump; a large plunger is arranged on the upper end of the stator and a plunger is arranged in the large plunger; the outer side of the plunger is sleeved with a plunger bushing, the upper end of which is connected with the inlet valve, a row of oil valves are arranged on the case; an electrohydraulic proportional speed-regulating valve and an overflow valve are arranged on the pump bonnet; the slippage pump is arranged at the left end of the main pump. The invention causes the rotator always to have an film lubrication with the internal surface of the stator during the rotation, at the same time the radial load of the stator and the rotator and the lateral force of the plunger are reduced, the service life is prolonged and the work efficiency is improved and the application fields are wider; furthermore, the invention can gradually occupy the international market and has bright prospect.

Description

The 160Mpa electro-hydraulic proportional control radial piston pump

Technical field

The present invention relates to hydraulic pressure, machinery, electronic technology field, particularly a kind of 160Mpa (ultrahigh pressure) electro-hydraulic proportional control radial piston pump.

Background technique

Have only German BoScH company that this type superpressure pump is arranged at present in the world, it belongs to the little displacement hydraulic pump of ultrahigh pressure, and its structure characteristic and basic mechanical design feature index are: volume is little, and is simple in structure, good manufacturability, pressure can reach 160Mpa to 180Mpa, and rotating speed is 3000rpm, and noise is 75dB, total efficiency is 84%, life-span is 3000～5000 hours, and has characteristics such as strong shock resistance, is the more advanced and up-to-date a kind of high-performance ultrahigh pressure radial plunger pump in the world today.Owing to be widely used, be again energy-conservation and power source that reduce to pollute, so countries in the world as some national major parts of Japan, Korea S, Britain, the U.S., China and Europe from the import of German BoScH company.Domestic Automotive Industry environmental requirement diesel engine must adopt the EFI oil supply system, change the EFI oil supply system into fuel system for diesel engine, be badly in need of a large amount of this power sources, secondly also has petrochemical industry, shipping industry, fire-fighting, nuclear powered submarine and heavy machinery and extra high voltage system tool industry etc., annual import volume up to 150,000 about, and increase considerably trend in addition, China does not also have this product at present, long-term dependence on import, yet not only import is up to 10000 yuan/platform, and maintenance is purchased valency in addition up to several times of prices.The import cycle is long, has a strong impact on the development of production.Domestic and international existing superpressure pump ubiquity radial load is excessive, and friction pairs such as rotor and stator do not carry out film lubrication, and plunger to-and-fro motion process is poor to neutrality, cause plunger and plunger bushing lateral force excessive, entire pump internal organ friction pair quick abrasion, volumetric efficiency is low, defectives such as life-span weak point.

Summary of the invention

The purpose of this invention is to provide a kind of long working life, energy-conservation, reduce a kind of more widely 160Mpa electro-hydraulic proportional control radial piston pump in environmental pollution, high working efficiency, application.

The objective of the invention is to be achieved through the following technical solutions:

A kind of 160Mpa electro-hydraulic proportional control radial piston pump, comprise compositions such as slippage pump, plunger, housing, oil sucting valve, stator, pump cover, draining valve, transmission shaft, bearing, it is characterized in that described stator is located on the transmission shaft at main oil pump middle part, the stator upper end is provided with big plunger, be provided with plunger in the big plunger, the outside socket plunger bushing of plunger, the upper end of plunger bushing connects oil sucting valve, establishes a draining valve on the housing; On pump cover, be provided with electrohydraulic proportional velocity regulating valve and relief valve; The main pump left end is established a slippage pump.

The present invention has taked static balance technology and pressure and gap compensation for the main friction pairs rotor and the stator of pump, make rotor in rotary course, film lubrication be arranged all the time with stator inner surface, reduced the lateral force of the radial load and the plunger of stator and rotor simultaneously, its basic mechanical design feature index can reach: pressure: 160Mpa～200Mpa, rotating speed 3000rpm, noise: 73dB, total efficiency is 85%, the life-span: more than 6000 hours.With external like product ratio, technical performance index reaches the advanced level that part index number is higher than external like product, the long working life of pump not only, and the working efficiency of system is improved greatly, thereby the application is more extensive, as automotive industry diesel engine EFI system, Petro-Chemical Machinery equipment, fire-fighting, boats and ships, nuclear powered submarine, heavy machinery, waterpower hydroelectric project and all kinds of heavy mechanical equipment dismantling devices etc. all are badly in need of this ultrahigh pressure radial plunger pump, add up according to preliminary investigation, China will produce 6～80,000 every year, annual can saving supported or earned foreign exchange more than 800,000,000 yuan, but also occupying inter-national market gradually has a extensive future.

Description of drawings

Fig. 1 is a structural representation of the present invention

Fig. 2 looks schematic representation for the right side of Fig. 1

Fig. 3 is the piston structure schematic representation

Fig. 4 looks schematic representation for Fig. 3 left side

Fig. 5 is big piston structure schematic representation

Fig. 6 is Fig. 5 left side TV structure schematic representation

Fig. 7 is the stator structure schematic representation

Fig. 8 is Fig. 7 left side TV structure schematic representation

Embodiment

The present invention is by stator 7, eccentric shaft on the transmission shaft 14, big plunger 4, plunger 2, plunger bushing 6, housing 3 and pump cover 8 are formed airtight swept volume, stator 7 is located at transmission shaft 14 upper ends at main oil pump middle part, stator 7 upper ends are provided with big plunger 4, be provided with plunger 2 in the big plunger 4, plunger 2 outside socket plunger bushings 6, the upper end of plunger bushing 6 connects oil sucting valve 5, adorn a draining valve 9 on the housing 3, because stator 7 is established an eccentric e with the eccentric shaft (rotor) on the transmission shaft 14, when eccentric shaft on the transmission shaft 14 rotates, it is oil suction that plunger 2 epicoele volumes increase, and low pressure oil Pb passing hole channel and oil sucting valve 5 that fluid is discharged by slippage pump 1 enter plunger 2 epicoeles, along with eccentric shaft (rotor) rotation on the transmission shaft 14, plunger 2 volumes reduce, the fluid passing hole channel of plunger 2 epicoeles and draining valve 9 are discharged, this pump is totally 3 plungers, the work of each plunger is as above identical, this pump eccentric shaft (rotor) when rotating a circle on transmission shaft 14 like this, just form and inhale, oil extraction once, promptly be this pump delivery q, the flow of this pump is Q=nq.The pressure of slippage pump 1 is set up by relief valve 17, the flow that enters main pump is set up by proportional velocity regulating valve 18, therefore this pump can be regulated the flow of pump by passing ratio series flow control valve 18 in the certain flow scope, and realizes the size of needed flow of computer controlled system and pressure.

As shown in Figure 3, on plunger 2, be equipped with φ 1 aperture 2.1, pressure oil is introduced the bottom of plunger 2, and at plunger 2 bottoms installation adjustable damping controller 2.3, damping controller 2.3 bottoms are provided with plenum chamber 2.2, make a call to 8 φ, 2.6 draining apertures 2.4 in plunger one week of 2 middle parts, when eccentric shaft (rotor) rotates, stator 7 adds in little swing process moving up and down, plunger 2 in plunger bushing 6 on, following motion, because the plenum chamber 2.2 of plunger 2 bottoms has film lubrication, plunger 2 is automatic centering campaign easily in plunger bushing 6, thereby eliminate the lateral force between plunger 2 and the plunger bushing 6 greatly, because plunger 2 bottom plenum chambers 2.2 have the effect of certain pressure oil, the reaction thrust of oil pressure has also been offset the radial load of part plunger simultaneously.

Big plunger 4 bottom surfaces and stator 7 this to friction pair, because eccentric shaft 14 rotations, on the stator 7, following motion, also has the trace swing simultaneously, and the radial load that big plunger 4 bears, act on stator 7 surfaces, and big plunger 4 also will be done the sub-elliptical motion, as shown in Figure 5, we adopt hydrostatic support to lubricate way, have φ 0.38 damping hole 4.1 and φ 4 plenum chambers 4.2 in big plunger 4 bottoms, high pressure oil enters plenum chamber 4.2 through plunger 2 by big plunger 4 bottom damping holes, plenum chamber 4.2 high pressure oils can be by flowing in the pump housing after big plunger 4 bottom surfaces and stator 7 surface lubrications, this has just formed open loop control to friction pair so big plunger 4 bottom surfaces and stator 7 surfaces, big plunger 4 is in the zone of high pressure, this just has high pressure oil lubricated to friction pair, low pressure area has low pressure oil lubricated, and because 4.2 pairs of big plungers 4 of plenum chamber have reaction thrust, balance the impacting force of the big 4 pairs of stators 7 of plunger of a part again, the wearing and tearing of big plunger 4 and stator 7 surface friction pairs have so not only been solved, simultaneously its material requirements is not needed to carve so severe yet, promptly solved the difficult problem of processing technology and material.Bottom plane and plunger 2 bottom surface surface of contact also form open loop control in the big as shown in Figure 5 plunger 4.3, and 4.4 is big plunger internal drainage windows among Fig. 6.

As shown in Figure 1, stator 7 internal surfaces and eccentric shaft 14 fastnesses, it not only will bear whole radial loads of radial plunger, and eccentric shaft 14 also will be in stator 7 internal surface high speed rotating, cause wearing and tearing and heating phenomenon easily, in order to solve this difficult problem, the present invention to eccentric shaft 14 and stator 7 internal surfaces this to friction pair, take the way of gap and pressure compensation and film lubrication, solved its wearing and tearing and heating.As shown in Figure 7, on stator 7 outer surface slip surfaces, be provided with the damping controller 7.3 that communicates with stator 7 internal surfaces, damping controller 7.3 the inners are provided with 1/6 circular groove 7.1, totally 3 sections garden curve baths, and be provided with static balance groove 7.2 in stator 7 both sides, like this, when pressure oil enters shown in 7.2 circular groove by plunger 2 and big plunger 4, transient flow is in the 7.2 static balance grooves of both sides, all pressure oil flows in the housing again in the static pressure groove 7.2 simultaneously, so eccentric shaft 14 all has film lubrication with stator 7 internal surface friction pairs, while pressure oil flows to this section of housing garden cambered surface by 1/6 circular groove stator is also had a reaction thrust, balance most of radial load of 2 pairs of stators 7 of plunger, and can also carry out gap and pressure compensation together with 7.2 pairs of eccentric shafts 14 of static balance groove and stator 7 internal surface friction pairs, both stator 7 and eccentric shaft 14 this fastness is had high pressure oil in the zone of high pressure, low pressure area also has half high pressure oil effect simultaneously, low pressure area is carried out pressure compensation, also compensated the gap of low pressure area fastness, and the gap, zone of high pressure is little, pressure is just high, the gap is big, pressure is just low, this all carries out open loop control by damper 7.3 and this gap to fastness, and the housing internal drainage discharges from drain tap 19.Make the entire pump running thus steadily, reduced noise, noise can be reduced to below the 73dB, has reduced wearing and tearing and heating significantly, and the life-span of pump can improve more than 6000 hours, and the life-span of similar pump is 3000～5000 hours in the world.

The present invention is provided with electrohydraulic proportional velocity regulating valve 18 and relief valve 17 on pump cover 8.Electrohydraulic proportional velocity regulating valve 18 is regulated the flow that enters main pump, and the flow of may command main pump within the specific limits can be realized computer control simultaneously, and relief valve 17 can be set up oil supply system pressure, two valves be positioned on can realize on the pump cover 8 integrated.

The present invention is provided with slippage pump 1 in the main pump left part, and this pump is supplied with the flow of main pump, has so just solved the not enough problem of ultrahigh pressure radial plunger oil suction under high rotating speed, thereby has improved the performance index of superpressure pump.

Claims

1. 160Mpa electro-hydraulic proportional control radial piston pump, comprise slippage pump, plunger, housing, oil sucting valve, stator, pump cover, draining valve, transmission shaft, bearing composition, it is characterized in that described stator (7) is contained on the main oil pump transmission shaft (14), stator (7) upper end is provided with big plunger (4), be provided with plunger (2) in the big plunger (4), the outside socket plunger bushing of plunger (2) (6), the upper end of plunger bushing (6) connects oil sucting valve (5), establishes a draining valve (9) on housing (3); Pump cover (8) is provided with electrohydraulic proportional velocity regulating valve (18) and relief valve (17); The main oil pump left end is established a slippage pump (1).

2. 160Mpa electro-hydraulic proportional control radial piston pump according to claim 1, it is characterized in that having on the described plunger (2) aperture (2.1), an adjustable damping controller (2.3) is adorned in plunger (2) bottom, damping controller (2.3) bottom is provided with plenum chamber (2.2), has draining hole (2.4) one week in plunger (2) bottom.

3. 160Mpa electro-hydraulic proportional control radial piston pump according to claim 1, it is characterized in that described big plunger (4) bottom has damping hole (4.1), damping hole (4.1) bottom is plenum chamber (4.2), is provided with draining window (4.4) in the big plunger (4).

4. 160Mpa electro-hydraulic proportional control radial piston pump according to claim 1, it is characterized in that the circle both sides are provided with static balance groove (7.2) in the described stator (7), stator (7) outer surface slip surface is provided with the damping controller (7.3) that communicates with stator (7) internal circular surfaces, and damping controller (7.3) the inner is provided with 1/6 circular groove (7.1).